Thermochemistry and Kinetics — Chlorination in Gas

The reactions of recoil atoms with chlorinating reagents (carriers) are considered in some detail to outline a general approach. It might be of use especially when it is desirable to avoid high working temperatures. 

3 Production of Transactinoid Elements, Synthesis and Transportation of Compounds 

Hence the chlorination is fast enough, that is, its time does not exceed lx, provided that 

Notice that the above limit holds only for the values of Eact the inequality by Eq. 3.5, when rewritten for the value of the enthalpy change in reaction is only a necessary, but not at all sufficient, condition for A Hr. 

Unfortunately, there is no broadly valid relation between the two quantities. The activation energies of the above chlorination reactions and analogous interactions of concern in this book have not yet been reported, and their calculation from the first principles seems difficult. Meanwhile, the above supposed chlorination steps involve atoms and molecules of lower halides - the species with unpaired electrons on an otherwise open shell configuration - which is exactly the IUPAC definition 

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